Engineer and ETO officers

Unlimited certification

MSN 1857 - Certificates of Competency: Training and Certification - Unlimited Engineer Officers
This is the main document that defines the certification structure and requirements for unlimited EOOW, second engineer and chief engineer.

MIN 511 - Alternative route engineer officer of the watch unlimited
This describes alternative entry for candidates who have previously studied engineering at degree, HND or apprenticeship levels.

MSF 4275 - Notice of Eligibility (NoE) application form
This is the form to be used to book an MCA oral exam leading to an unlimited engineer officer certificate of competency.

Unlimited electro-technical officer (ETO) certification

MSN 1860 - UK requirements for electro-technical officers
This document introduces electro-technical officer and senior electro-technical officer certificates of competency.

Alternative entry
The MCA will soon issue a MIN describing an alternative route to obtain a ETO CoC for candidates who have previously studied electronic engineering similar to MIN 511.

MSF 4259 - Notice of Eligibility (NoE) application form
This is the form to be used to book an MCA oral exam leading to an unlimited ETO certificate of competency.

Small vessel engineering certification (including Yachts less than 3,000GT and 9,000kW)

MIN 524 - Engineer officer small vessel Certificate of Competency
This is the main document that defines the new certification and structure for second and chief engineer certificates of competency on small vessels including yachts. This largely supersedes MSN 1859.

MIN 594 - Changes to Examinations leading to a Restricted Engineering UK Certificate of Competency
This gives some updated guidance on the small vessel engineering CoCs.

MIN 543 - Sea service verification on large yachts
Describes the revised arrangements for the verification of sea service for seafarers working on large yachts.

MSF 4900 - Notice of Eligibility (NoE) application form
This is the form to be used to book an MCA oral exam leading to a small vessel engineer officer certificate of competency.

Yacht restricted certification (Yachts, less than 3,000GT and 9,000kW)

MGN 1859 - Certificates of Competency: Training and Certification - Yacht Engineering Officers
This is the main document that defines the certification structure and requirements for MEOL, Y4, Y3, Y2 and Y1 chief engineer certificates of competency.

MSF 4278 - Notice of Eligibility (NoE) application form
This is the form used to book an MCA oral exam leading to a yacht engineer officer certificate of competency.


Deck officers

Unlimited certification

MSF 4274 - Notice of Eligibility (NoE) application form 
This is the form to be used to book an MCA oral exam leading to an unlimited officer certificate.

Yacht restricted certification (Yachts Less Than 3,000GT)

MSN 580 - New route to a UK Officer of the Watch (OOW) yachts Certificate of Competency
This document details a new route for applicants looking to gain a UK OOW yachts, less than 3,000GT CoC. This should be read in conjunction with MSN 1858.

MSN 1858 - Training and Certification Guidance: UK Requirements for Deck Officers on Large Yachts (over 24m) 
This is the main document that defines the certification structure and requirements for OOW, chief mate and master on yachts less than 3,000GT.

Training Record Book for yacht ratings and yacht officers 
Those who have obtained all or some of their yacht service on yachts under 24m. need to complete this training record book.

MSF 4343 - Notice of Eligibility (NoE) application form 
This is the form to be used to book an MCA oral exam leading to a yacht certificate.


Other relevant regulations and documents affecting engineer, deck and ETO officers, both limited and small vessel/yacht restricted

MSN 1865 - UK requirements for emergency, occupational safety, security, medical care and survival functions 
This document describes in detail the five-yearly updating requirements for STCW basic and advanced safety courses.

MIN 494 - Revalidating a Certificate of Competency
This document contains the new high voltage requirements and other changes brought in by the Manila Amendments for revalidation of the certification of competency.

MIN 435 - Clarification of dyslexia policy 
Explanation of the exam and assessment procedures for candidates with proven dyslexia.

List of ENG1 approved doctors (UK based) 
UK-based MCA-approved doctors who carry out ENG1 medical examinations.

List of ENG1 approved doctors (international) 
Non-UK-based MCA-approved doctors who carry out ENG1 medical examinations.


Definitions of types of service for yachts

The MCA works with the following definitions: 

  • On-board yacht service: time spent on yachts irrespective of the vessel activity.
  • Actual sea service: time spent at sea which may include time at anchor or river and canal transits associated with the passage. 
  • Stand-by service: time moored while fully victualled, fuelled and stored ready to proceed safely to sea, eg, awaiting the owner’s arrival or for a charter to commence. 
  • Yard service is time when standing by a build, refit or repair. 
  • Sea service includes a combination of actual sea service, standby service and/or yard service.